A “Psycho” scammer who dressed up as his dead mom so he could collect her Social Security benefits will instead be checking into state prison for up to 41 years after being sentenced today for the bizarre Norman Bates-like stunt.

Thomas Prusik-Parkin was convicted this month of grand larceny for posing as Irene Prusik for several years in order to pocket more than $44,000 of the dead woman’s government benefits.

“It’s amazing – it’s amazing!” Justice Vincent DelGiudice said as he sentenced the frail, bearded man. “It borders on ludicrous that you expected to get away with this.”

Prusik-Parkin’s actress mom, Irene, was 73 when she died in 2003. Within days of Prusik’s death, authorities charged, her son changed her Social Security numbers and doctored other documents so he could launch his money-grubbing scheme.

The admitted Norman Bates admirer’s kooky cross-dressing caper fell apart in 2009 when he donned the matronly getup to tell Brooklyn prosecutors he was being ripped off by a man who bought out of foreclosure the $2.2 million Park Slope building deeded to him by his mom.

DelGiudice shook his head as he recalled how the elderly “woman” claimed she had cataracts when an investigator from the Brooklyn District Attorney’s office asked why the lights in her apartment were dimmed.

Jurors in the trial were shown a video of Prusik-Parkin in a platinum woman’s wig, sunglasses and a dress during a visit to a Department of Motor Vehicles office.

“It just boggles the mind that you continued this plan of deceit by impersonating her and committing a fraud at the DMV by dressing up… to hoodwink the clerk,” DelGiudice said.

Prusik-Parkin, 52, maintained that it wasn’t him in the videos, claiming instead that an “imposter” dressed up as his mom.

During a rambling statement before he was sentenced, Prusik-Parkin insisted he hadn’t rejected a deal from prosecutors that could have sprung him from jail, rather than face a sentence of 13 2/3 to 41 years in prison.

He also denied he was out to line his pockets and even commented on the fashions seen in the videos.

“They’re old discotheque shirts from the 1970s,” Prusik-Parkin said. “None of these blouses match the video that was seen here.”

Then, he finally stopped babbling.

“Mr. Parkin,” DelGiudice said with a chuckle, “You’re an amazing character.”